National Climate Report - September 2016
September Temperature and Precipitation Percentile Maps

« National Climate Report - September 2016

September Temperature and Precipitation Percentile Maps


One way to depict how a month or season compares to its history is to use a ranking system. NCEI has done this for many years for the climate divisions, states, etc. The maps below depict rankings based on the 5km gridded dataset, nClimGrid. Each grid point is ranked based on the other values in its own period of record.

Ranking the grid cells provides a greater detail for the regional patterns across the U.S. For instance, much of the eastern third of the U.S. was record- to near-record warm in September. This warmth is also evident in the climate division rank maps. However, the newly developed gridded percentile maps reveal finer details, like the record warmth across a large portion of Florida and smaller pockets across the Great Lakes region. Similarly, small pockets of below normal temperatues can be seen across some areas in the west, which are not evident in the statewide rank maps.

More information on the methodology behind the rankings can be found here: https://www.ncdc.noaa.gov/monitoring-references/dyk/ranking-definition

Average Temperature Total Precipitation
 Mean Temperature Percentiles (sep)  Total Precipitation Percentiles (sep)

Citing This Report

NOAA National Centers for Environmental Information, State of the Climate: National Climate Report for September 2016, published online October 2016, retrieved on August 17, 2019 from https://www.ncdc.noaa.gov/sotc/national/201609/supplemental/page-1.

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